Thin wall ductile and austempered iron castings

• Autorzy: Fraś E. , Górny M.
• Języki publikacji: EN

Abstrakty

EN

It has been shown that it is possible to produce thin wall castings made of ductile iron with wall thickness in the range of 1.2 to 2.9 mm (without chills, cold laps and misruns). Thin wall ductile iron castings can be lighter (380 g) than their substitutes made of aluminium alloys (580 g). The kinetics of austenitising transformation was studied in unalloyed ductile iron. The advance of transformations during austenitising was monitored by measurement the fraction of martensite and also by dilatometic studies. It has been shown that in thin wall ductile iron castings austenitising at 880 ^oC for 20 minutes is adequate to obtain the austenite matrix at the end of the first stage of austempering heat treatment cycle.

Słowa kluczowe

EN

thin wall castings; ductile iron; austempered iron; austenitising; austempering

PL

odlewanie cienkościenne; żeliwo sferoidalne; austenit; austenityzowanie

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2010
• Tom: Vol. 10, iss. 3
• Strony: 5--10
• Opis fizyczny: Bibliogr. 12 poz., il., rys., tab., wykr.

Twórcy

autor

Fraś E.

• AGH - University of Science and Technology, Rymonta 23, 30-059 Cracow, Poland

autor

Górny M.

• AGH - University of Science and Technology, Rymonta 23, 30-059 Cracow, Poland

Bibliografia

• [1] K. L. Hayrynen, K.R. Brandenberg, Carbidic Austempered Ductile Iron ( CADI)- the New Wear Material, AFS Transactions, vol. 111, (2003) 845-850.
• [2] D. Venugopolan, A kinetic model of the γ - α+ Gr eutectoid transformation in spheroidal graphite cast iron, Metallurgical and Materials Transactions, vol. 21A, (1990) 913-918.
• [3] D. J. Moore, J.R. Parolini, K.B. Rundman, On the kinetics of austempered gray cast iron, vol.111, (2002) 911-930.
• [4] S.M. Butorabi, A.A. Fallah, Austempering kinetics of low carbon-aluminium cast iron, AFS Transactions, vol. 105, (1997) 757-761.
• [5] K.F. Laneri, J. Desimoni, R.C. Mercader, R.W. Gregorutti, J.L. Satutti, Thermal dependence of austempering transformation kinetics of compacted graphite cast iron, Metallurgical and Materials Transactions A, vol. 32, (2001) 511-518.
• [6] M. M. Cisneros, M.J. Perez, R.E. Campos, E. Valdes, The role of Cu, Mo, and Ni on the bainitic reaction during the austempering of ductile iron, International Journal of Cast Metals Research”, vol.111, (1999) 425-430.
• [7] J. Mallia, M. Grech, Effect of silicon content on impact properties of austempered ductile iron, Material Science and technology, vol. 113, (1997) 408-414.
• [8] N. Darwish, R. Elliot, Austempering of low manganese ductile irons, Part 3. Variation of mechanical properties with heat treatment conditions, Material Science and technology, vol. 9, (1993), 882-889.
• [9] K. L. Hayrynen, J.K. Keough, Wear properties of austempered ductile irons. AFS Transactions, vol. 113, (2005) 803-812.
• [10] F. Zanardi, Machinable ADI in Italy, AFS Transactions, vol. 113, (2005) 835-847.
• [11] B. N. Olson, K.B. Moore,, G.R. Simula, Potential for practical applications of Ausforming Austempered Ductile Iron, AFS Transactions, vol. 111, (2002) 965-881.
• [12] M. Gagne, C. Labrecque, Effect of Silicon content and wall thickness on the properties of Austempered Ductile Iron”, AFS Transactions, vol. 114, (2006) 615-625.